Really? (goes off and tries it...) Weird. The wildcard doesn't register anymore. According to the Google-guide, it's now used as a multiplier symbol in their calculator. There's no mention of any other code to use as a wildcard character anymore. I suppose they changed "*'s" functionality just to include the search-box calculator, and they forgot to add a new wildcard symbol to replace it.
Maybe somebody should write to Google about that oversight...